Thus we get \(g_{_{\psi NN}}\simeq 1.6\times 10^{-3}\) , which is calculated by
the measured branching fractions and total widths of \(J/\psi \)  (\(m_{\psi }=3096.916\)  MeV and \(\Gamma _{\psi \rightarrow \bar{p}p}\simeq 0.197\)  keV)
[1]}.
